Amy wants to find out if there is a correlation between daily maximum relative humidity and daily mean pressure.
Suggest a suitable null and alternative hypothesis for a two-tail test.
Amy takes a sample of 14 days and finds a product moment correlation coefficient of kkk, where −1≤k≤1-1 \leq k \leq 1−1≤k≤1.
Carry out the hypothesis test at the 5% significance level, stating the values of k k\,k for which there is evidence to suggest there is a correlation between daily maximum relative humidity and daily mean pressure.
340 exam-style questions on Edexcel A Level Maths Regression, Correlation and Hypothesis Testing, covering 1.1 Exponential Models, 1.2 Measuring Correlation, and 1.3 Hypothesis Testing for Zero Correlation. Each one has a worked solution and a mark scheme showing where the marks go.